Solar panel



FIG. 1 is a perspective view of the solar panel showing the top and right sides of my new design;

FIG. 2 is a top plan view of the solar panel;

FIG. 3 is a left side view of the solar panel, the right side being a mirror image thereof;

FIG. 4 is a bottom plan view of the solar panel;

FIG. 5 is a front elevation view of the solar panel; and,

FIG. 6 is a rear elevation view of the solar panel. 

The ornamental design for a solar panel, as shown and described. 